@book{177565,
	author = {Lathi, B. P.},
	title = {Modern digital and analog communication systems / },
	publisher = {Oxford University Press,},
	year = {1998.},
	address = {New York :},
	edition = {3rd ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0605/97016040-d.html}
}